condition mean min max 0 h after light 0.0 0.0 0.0 4 h after light 0.0 0.0 0.0 8 h after light 2.177295 0.0 4.35459 4 h after dark 0.0 0.0 0.0 8 h after dark 0.0 0.0 0.0 12 h after dark 0.0 0.0 0.0